feat (react-virtualizer): Remove react-virtualizer and deprecate from repo (#34939)

Author: Mitch-At-Work

apps/public-docsite-v9/src/Concepts/PackageMaturityLevels.stories.mdx

@@ -57,7 +57,6 @@ Fluent UI v9 packages are categorized into four main maturity levels that indica
 Some packages don't follow the preview naming convention but are still considered preview status, as they were created before the preview phase was introduced:
 
 - `@fluentui/theme`
-- `@fluentui/react-virtualizer`
 
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